I'd like to clean up unused text formats on some D7 sites. So I need to know which formats are not used. I tried using VBO for this, but there is no field
Content: Text format I can add there.
What's a good way to get an overview of formats in use? I'd be ok with using
drush for this and I can settle with just knowing the nodes and blocks that use a specific format (ignoring other places like views headers).
I'm not looking for a generic answer like "it's stored in these and these database tables". I'm looking for a practical solution that I can use on many Drupal sites.